The process of scraping away or wearing down by friction, especially of rock surfaces or geological formations.
From Latin 'eradere' (to scrape out, from 'e-' out + 'radere' to scrape) + '-ion' (noun suffix). This geological and geographical term describes the mechanical wearing away of land through wind, water, or ice action.
Geologists use 'erasion' to describe how rivers, glaciers, and wind slowly sculpt landscapes over millions of years—it's the same root as 'erase,' but applied to mountains and canyons instead of pencil marks, reminding us that 'scraping away' works at every scale!
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